[presubmit] Enable readability/namespace linter checking.

src/profiler/unbound-queue.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PROFILER_UNBOUND_QUEUE_
 #define V8_PROFILER_UNBOUND_QUEUE_
 
 #include "src/allocation.h"
 #include "src/base/atomicops.h"
 
@@ skipping 24 matching lines @@
   struct Node;
 
   Node* first_;
   base::AtomicWord divider_;  // Node*
   base::AtomicWord last_;     // Node*
 
   DISALLOW_COPY_AND_ASSIGN(UnboundQueue);
 };
 
 
-} }  // namespace v8::internal
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_PROFILER_UNBOUND_QUEUE_